It is illogical to think that clothing can be ‘lucky’, but it does make you feel good, which influences your confidence and works as an effective placebo.
Mine would be any of these.
My power outfits are mostly skirts and dresses. I really like dressing that way, but once in a while, wide-legged pants are also very comfortable and stylish. I love the swish of a good wide-legged pant.
All of my pieces are a mix of thrifted, consignment, low-end and higher-end pieces, that just fit well, look impeccable and make me feel good, which is the whole point.